CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Zhiming Ding,Yaheng Zhang,Jian Ruan,Chuanting Fan,Runjuan Du,Jie Zhang,Zhiyong Tang
Electrophotocatalytic C-H hydroxylation of benzene is an emerging green technology with high potential for producing phenol in one step. However, it is still limited by efficiency and scale-up challenges in batch process. In this study, a novel electrophotochemical flow microreactor was designed and manufactured using 3D printing technology. Static mixers were incorporated to enhance the mixing. The effect of various parameters, such as electrode materials, reaction time, potential, and reactant concentration, etc., on the continuous synthesis of phenol in the as-developed microreactor was investigated. Furthermore, machine learning (ML) algorithms were employed to explore the impact of these parameters on the reaction efficiency. With cost-effective electrodes, higher phenol productivity was achieved in the present flow microreactor when comparing with batch counterpart and literature value. This study offers insights into the optimization of electrophotochemical microreactor for the hydroxylation of benzene, and provides guidance for exploring sustainable electrophotocatalytic organic synthesis in flow.
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ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Yinan Li,Liulian Huang,Zhibin He,Jianguo Li,Chenglong Fu,Qinghong Zheng,Lihui Chen,Yonghao Ni
Solar-driven evaporators have emerged as a sustainable strategy for water purification and energy harvesting. Designing advanced systems that achieve high evaporation performance, long-term operational stability, and resistance to salt crystallization remains a significant challenge. In this study, an innovative Janus membrane is proposed that addresses these challenges, featuring a super hydrophilic cellulose nanofiber (CNF)@Hexadecyl Trimethyl Ammonium Bromide (CTAB)-MXene layer and a superhydrophobic polytetrafluoroethylene (PTFE) layer. CTAB modification of MXene enhances its interlayer spacing and specific surface area, enabling rapid water transport and efficient solar energy absorption of the CNF@CTAB-MXene layer. A PTFE layer is sputter-deposited onto CNF@CTAB-MXene layer, effectively preventing salt accumulation and membrane fouling, with plasma pre-treatment ensuring excellent interfacial bonding between these two layers. Under 1 sun illumination, the CNF@CTAB-MXene/PTFE Janus evaporator achieves a remarkable evaporation rate of 1.51 kg m −2 h −1 with outstanding salt resistance. The synergy between superhydrophilic and superhydrophobic layers facilitates efficient water transport while maintaining long-term stability without performance degradation. Additionally, the evaporator generates a voltage of 343.8 mV during thermoelectric power generation, and its unique design allows electricity generation from wind energy at night. This integrated system provides an advanced and durable solution for water-power co-generation, offering practical benefits for off-grid or remote regions.
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JOURNAL OF THE INDIAN CHEMICAL SOCIETY
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2025
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IF 3.4
Wei Shen,Zilong Yang,Xiaolin Guo,Hongxiao Jin,Wenxiang Chai,Hongliang Ge,Dingfeng Jin
Amino acid ionic liquids (AAILs) are potential green substitutes of aqueous amine solutions for carbon dioxide (CO 2 ) capture. In this study, we prepared three amino acid ionic liquids, constructed from tetrabutylphosphine hydroxide in combination with glycine, histidine, and arginine. We have conducted a comprehensive study on the CO 2 absorption capacity of structures containing single, double, and triple N–H groups. The solubility of CO 2 in [P 4444 ][Gly], [P 4444 ][His] and [P 4444 ][Arg] were measured experimentally over a temperature range of 30–110 °C and up to a pressure of 0.75 MPa. The results indicate that the solubility of carbon dioxide in amino acid ionic liquids decreases with increasing temperature, while it increases with increasing pressure. The optimal CO 2 absorption conditions of three amino acid ionic liquids were determined to be 50 °C, 0.75 MPa. Moreover, CO 2 absorption capacity of three amino acid ionic liquids followed the order: [P 4444 ][Arg] > [P 4444 ][His] > [P 4444 ][Gly]. Studies on the recycling and regeneration of amino acid ionic liquids verified their reusability in the process and confirmed that the reaction between AAILs and CO 2 could be reversed at 140 °C. Finally, the recycle capacity and CO 2 removal efficiency of [P 4444 ][Gly], [P 4444 ][His] and [P 4444 ][Arg] were evaluated.
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ACS Catalysis
·
2025
·
IF 13.1
Jia-Yi Chen,Jie-Tian Yang,Yu-Shu Han,Yu-Qiong Huang,Na-Na Tian,Ju-Hua Li,Zhong-Li Wang
Acidic oxygen evolution electrodes are essential anodes in acidic water splitting, carbon dioxide, nitrogen electrochemical reduction, etc. The iridium–ruthenium (Ir–Ru)-based catalysts have the potential to withstand the harsh acid corrosion and oxidation environments of the oxygen evolution reaction, but there are still challenges in designing and preparing highly active and stable integrated Ir–Ru electrodes. Herein, we develop a cost-effective and scaled-up passivation engineering strategy to prepare an integrated Ir–Ru anode containing a Ti substrate, a manganese titanate (MnTiO3) passivation layer, and an Ir–Ru oxide catalytic layer. By uniformly loading an appropriate amount of divalent Mn ions (Mn2+) on the surface of zerovalent Ti metal (Ti0) and heating to 350 °C in air, a special passivation reaction occurred between Mn2+ and Ti0, producing a dense MnTiO3 passivation layer. The conductive MnTiO3 passivation layer forms a strongly bonded interface with the Ti substrate, effectively protecting the Ti substrate from electrochemical oxidation to insulating TiO2. Then, on the surface of MnTiO3, a thin layer of complex ions of Ir and Ru is uniformly adsorbed, and after secondary heat treatment, Ir–Ru mixed oxides are generated. Interestingly, the lattice of MnTiO3 perfectly matches that of Ir and Ru oxides, thus achieving the epitaxial growth of Ir–Ru mixed oxides on the surface of MnTiO3 with strong interaction interfaces. These result in the high activity and stability of low-loading Ir–Ru oxides, with an overpotential of only 165 mV at 10 mA cm–2 and over 3000 h of stable operation at 300 mA cm–2 in acidic electrolytes. In situ Raman spectroscopy combined with isotope labeling experiments further confirms that the Ir–O–Ru local structure suppresses the participation of lattice oxygen and enhances the stability of active Ru species.
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Nanomaterials
·
2025
·Vol. 15
·期 5
·401
·
IF 4.3
Xiaoxiao Peng,Haiyan Jing,Lan Yu,Zongdeng Wu,Can Su,Ziyu Ji,Junjie Shu,Hua Tang,Mingzhu Xia,Xifeng Xia,Wu Lei,Qingli Hao
To significantly improve the tribological performance of epoxy resin (EP), a novel h-BN/MoS2composite was successfully synthesized using spherical MoS2particles with lamellar self-assembly generated through the calcination method, followed by utilizing the “bridging effect” of a silane coupling agent to achieve a uniform and vertically oriented decoration of hexagonal boron nitride (h-BN) nanosheets on the MoS2surface. The chemical composition and microstructure of the h-BN/MoS2composite were systematically investigated. Furthermore, the enhancement effect of composites with various contents on the frictional properties of epoxy coatings was studied, and the mechanism was elucidated. The results demonstrate that the uniform decoration of h-BN enhances the chemical stability of MoS2in friction tests, and the MoS2prevents oxidation and maintains its self-lubricating properties. Consequently, due to the protective effect of h-BN and the synergistic interaction between h-BN and MoS2, the 5 wt % h-BN/MoS2composite exhibited the best friction and wear resistance when incorporated into EP. Compared to pure EP coatings, its average friction coefficient and specific wear rate (0.026 and 1.5 × 10−6mm3N−1m−1, respectively) were significantly reduced. Specifically, the average friction coefficient decreased by 88% and the specific wear rate decreased by 99%, highlighting the superior performance of the h-BN/MoS2-enhanced epoxy composite coating.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
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IF 5.6
Jie Zhou,Siyuan Jin,Ruizhi Wu,Xiaochun Ma,Mengyao Pang,Zhe Yu,Guixiang Wang,Jinghuai Zhang,Boris Krit,Sergey Betsofen,Vitalii Neshchimenko,Buzikov Ruslan,Min Qiu,Yurong Yang,Jiaming Chen
Microarc oxidation (MAO) coatings incorporating hexagonal boron nitride (h-BN) nanoparticles were synthesized on Mg-Li alloys. The effects of h-BN nanoparticle concentration on the structure, phase composition, and tribological properties of the MAO coatings were systematically investigated. The results indicate that the addition of h-BN nanoparticles induces the formation of protrusions on the coating surface, varied in size and distribution with the concentration of h-BN particles. The protrusions are advantageous for enhancing the wear resistance of the coating, owing to the effective reduction of the contact area and the lubricating impact of the released h-BN particles during wear. The thickness and hardness of the coating contained h-BN particles are significantly elevated. At an optimal h-BN concentration of 7 g/L, the composite coating exhibits the lowest average coefficient of friction (COF = 0.59) and the minimum wear rate (W = 2.6 × 10 −6 mm 3 /N·m), thereby demonstrating superior tribological performance.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Xuanlin Li,Wenchao Shi,Xiner Li,Zhe Dong,Shili Zhao,Tian He,Yang Tong,Xiang Li,Beibei Chen
Creating high-quality and highly adaptable self-lubricating surfaces at the interface of mechanical components is significant in extending the lifespan of equipment. Due to the limitations of the performance of a single nanofiller, its enhanced polymer-based coatings often struggle to meet the requirements of harsh working environments. In this study, the 2D/2D nanohybrid of graphitic carbon-nitrogen (g-C 3 N 4 ) supporting h-BN nanosheets (BNNSs) was prepared using the facile calcination method. Furthermore, its tribological enhancement on epoxy (EP) composite coating was evaluated by sliding against 440 C steel ball. The “soft phase” of g-C 3 N 4 and “hard phase” of BNNSs in 2D/2D BNNSs/g-C 3 N 4 nanohybrid could integrate the multiple advantages and provide synergistic enhancement for epoxy self-lubricating composite coating. The BNNSs/g-C 3 N 4 demonstrated the optimal lubricating properties for EP compared to single BNNSs or g-C 3 N 4 . Compared with the pure EP coating, the friction coefficient and wear rate of the 0.5 wt% BNNSs/g-C 3 N 4 /EP coating were reduced by approximately 74.5 % and 80.9 %, respectively. The outstanding tribological properties of BNNSs/g-C 3 N 4 /EP were mainly due to the synergistic enhancement of BNNSs and g-C 3 N 4 nanosheets and the lubricating effect of high-quality transfer film.
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JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2025
·Vol. 58
·期 20
·205501
·
IF 3.2
Fan Li,Chuansheng Zhang,Yi Luo,Xiaoxiao Kong,Cheng Zhang,Boxue Du,Tao Shao
Hexagonal boron nitride (h-BN) has emerged as a critical thermal management material in electrical insulation systems due to its superior thermal conductivity and dielectric properties. Nevertheless, suboptimal filler-matrix interfacial compatibility hinders both thermal conductivity enhancement and dielectric performance in composites. This study introduces an innovative plasma bubble treatment strategy, utilizing the discharge within bubbles to simultaneously achieve h-BN exfoliation and surface hydroxylation. By producing plasma in a 3% H2O2 solution with Ar/O2 mixed gas, hydroxyl groups are successfully grafted onto h-BN surfaces. This surface modification improves the silane grafting efficiency with KH560, resulting in improved filler dispersion within the epoxy resin (EP) and the introduction of deep charge traps in interfacial regions. Under 9.77 W discharge power, composites containing 20 wt% h-BN treated for 10 min exhibits optimal performance characteristics. The modified composite attains a 327% thermal conductivity of pure EP while showing superior dielectric properties with a 12.4% increase in breakdown strength relative to untreated composite. These findings present an effective surface engineering approach for developing high-performance polymer composites for electrical insulation applications.
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JOURNAL OF ORGANIC CHEMISTRY
·
2025
·
IF 3.6
Qiujie Shan,Lu-Lu Chai,David James Young,Zhi-Gang Ren,Hong-Xi Li
The light-promoted, nickel-catalyzed hydrogen-evolution C(sp3)–H acylation of simple alkanes with aromatic aldehydes has been achieved without the need for additional photosensitizers or oxidants. This reliable and atom-economical reaction afforded a broad range of aryl alkyl ketones in good yields, with H2 as the sole byproduct. It was successfully demonstrated on a gram scale as well as for the postfunctionalization of drug molecules. Aromatic aldehydes play multiple roles, including a photosensitizer, a coupling partner, and a hydrogen atom transfer agent.
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高影响因子
MOLECULES
·
2025
·Vol. 30
·期 13
·2691
·
IF 4.6
Jiuhu Zhao,Jingjing Jiang,Guanyu Chen,Meng Wang,Xiaoyuan Zuo,Yanjiao Bi,Rongshu Zhu
The selective catalytic reduction of NOxwith CH4(CH4-SCR) holds the potential to simultaneously abate harmful NOxand CH4greenhouse gases. In this study, a series of bimetallic M-In/H-SSZ-39 catalysts (where M represents Cr, Co, Ce, and Fe) were prepared via an ion exchange method and subsequently evaluated for their CH4-SCR activity. The influences of the preparation parameters, including the metal ion concentration and calcination temperature, as well as the operating conditions, such as the CH4/NO ratio, O2concentration, water vapor content, and gas hourly space velocity (GHSV), on the catalytic activity of the optimal Cr-In/H-SSZ-39 catalyst were meticulously examined. The results revealed that the Cr-In/H-SSZ-39 catalyst exhibited peak CH4-SCR catalytic performance when the Cr(NO3)3concentration was 0.0075 M, the In(NO3)3concentration was 0.066 M, and the calcination temperature was 500 °C. Under optimal operating conditions, namely GHSV of 10,000 h−1, 400 ppm NO, 800 ppm CH4, 15 vol% O2, and 6 vol% H2O, the NOxconversion rate reached 93.4%. To shed light on the excellent performance of Cr-In/H-SSZ-39 under humid conditions, a comparative analysis of the crystalline phase, chemical composition, pore structure, surface chemical state, surface acidity, and redox properties of Cr-In/H-SSZ-39 and In/H-SSZ-39 was conducted. The characterization results indicated that the incorporation of Cr into In/H-SSZ-39 enhanced its acidity and also facilitated the generation of InO+active species, which promoted the oxidation of NO and the activation of CH4, respectively. A synergistic effect was observed between Cr and In species, which significantly improved the redox properties of the catalyst. Consequently, the activated CH4could further interact with InO+to produce carbon-containing intermediates such as HCOO−, which ultimately reacted with nitrate-based intermediates to yield N2, CO2, and H2O.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Ganhua Qiu,Ting Wang,Xiaoli Li,Xueqin Tao,Benxia Li
A heterostructure photocatalyst consisting of BiOCl nanoplates and a bismuth-organic hybrid layer (alias BiCl3Br–CTA) was synthesized through a one-step solvothermal process. The BiOCl/BiCl3Br–CTA heterostructures exhibited broad light absorption and enhanced electron–hole separation efficiency. Moreover, the abundant oxygen vacancies (OVs) and superoleophilic surface endowed the photocatalyst with high abilities for adsorption and activation of O2 and toluene. Therefore, the BiOCl/BiCl3Br–CTA photocatalyst showed excellent activities for the C(sp3)–H bond oxidation of toluene under full-spectrum irradiation and visible light of simulated sunlight, which are 6.8-fold and 237.8-fold, respectively, than those of BiOCl nanoplates. The photocatalytic mechanism was revealed by a series of controlled experiments and in situ ESR detections. The selective oxidation of toluene was promoted by the synergy between the electrons in BiOCl for activating O2 and the holes in the BiCl3Br–CTA layer for activating the C(sp3)–H bonds. This research demonstrates an effective strategy to construct high-activity photocatalysts for challenging organic transformations.
研究领域:
材料科学
·
环境科学
·
催化化学
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2017
·
IF 2.714
Jingwen Song,Kai Ma,Tifeng Jiao,Ruirui Xing,Lexin Zhang,Jingxin Zhou,Qiuming Peng
Graphene oxide (GO)-based nanocomposite films via facile and appropriate self-assembly methods have demonstrated many potential applications in wide fields. This study demonstrates a facile and clean route to prepare graphene oxide-dye composite films using Langmuir-Blodgett (LB) technique at room temperature. By electrostatic interaction between cationic dye molecules and negatively charged GO sheets as well as π-π interactions, GO-dye composite LB films were formed spontaneously. As a soft platform for dye molecules, GO sheets induce dye molecules to self-assemble and form highly ordered structures containing H-aggregates and/or J-aggregates. The morphological characterization results show the formation of GO-dye composite films with smooth and dense surfaces. And the spectral results reveal that dye molecules stack in well-organized aggregates on the surface of GO sheets corresponding to monomers in bulk solution. The present research work about GO-dye composite films by LB method may provide new clues to prepare organized composite films and demonstrate potential applications in many fields.
研究领域:
材料科学
·
纳米科技
·
表面化学
·
胶体与界面科学
·
功能薄膜
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危险品化学品经营许可证（带存储）